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Pseudodiplodia Cenangiicola Sp. Nov., a Fungus on Cenangium Ferruginosum

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Pseudodiplodia Cenangiicola Sp. Nov., a Fungus on Cenangium Ferruginosum Karsienia i9: 30-Ji. 1979 Pseudodiplodia cenangiicola sp. nov., a fungus on Cenangium ferruginosum D.W. MINTER MINTER, D.W. 1979: Pseudodiplodia cenangiicola sp. nov., a fungus on Cenangium ferruginosum. - Karstenia 19: 30- 31. A new coelomycete, Pseudodiplodia cenangiicola Nevodovsky ex Minter, on ascocarps of Cenangium ferruginosum Fr. ex Fr. (a fungus inhabiting pine twigs) is described from Krasnoyarsk, Siberia. D. W. Minter, Commonwealth Mycological Institute, Ferry Lane, Kew, Surrey, England Cenangium ferruginosum Fr. ex Fr. (Ascomycetes, Botanical Nomenclature relevant. This states that Helotiales) is a common saprophyte on twigs of 'the distribution on or after 1 Jan. 1953 of printed pines. Collections in the herbaria of the Royal matter accompanying exsiccata does not constitute Botanic Gardens, Kew (K) and the Commonwealth effective publication', with the proviso that 'if the Mycological Institute, Kew (IMI) were recently printed matter is also distributed independently of the examined and two specimens of an unusual collection exsiccata, this constitutes effective publication'. from Krasnoyarsk (Siberia, U.S.S.R.) in October Unless the terms of the proviso were met, therefore, 1950 were discovered. They were labelled as Microdiplodia cenangiicola was not effectively, and Cenangium abietis (Pers.) Rehm (a synonym of C. hence not validly published. Examination of corre­ ferruginosum), and formed no. 29 of the second spondence files at C.M.I. revealed that in 1956 an fascicle of the exsiccata 'Griby SSSR', published in enquiry was made concerning the validity of other Moscow in 1954. On the label was included a Latin names published in the first fascicle of this series of description of a new species, Microdiplodia exsiccata. The reply made it clear that while the new cenangiico/a Nevodovsky: 'Maculae nullae; names of the first fascicle were effectively and validly pycnidiam in texturam apothecii alte demersa, ex published, there had been no independent distri­ cellulis dilute coloratis, solitaria, rare bini, trini bution of the printed matter: 'G.S. Nevodovsky died confluentia, 120-270 p. diam., portus simplex, (in 1952) before the first number of exsiccatae was sporae copiosae cinnamomeo-olivaceae, biloculares, published. It is why the new names of the described ovoideae, vix vel non constrictae, 9 - 12 x 4 - 6 p..' specimens are published only on the labels of the An illustration was provided of the spores and the exsiccatae.' This clearly indicates that Microdiplodia pycnidia as seen externally and in vertical section. cenangiico/a was invalidly published. The fungus The Index of Fungi contains no record of this described by Nevodovsky is, however, undoubtedly name, presumably because the description was so present, and since it appears to be a new and rather inconspicuous as to have been missed by the unusual fungicolous species, it is redescribed and compilers. Further, the exsiccata was published in validated below. 1954, making Art. 31 of the International Code of Karstenia 19. 1979 31 plus minusve hyalina et aseptata sunt. - Type: . Krasnoyarsk, U.S.S.R., in Cenangii jerruginosi \9. apotheciis, A. Yavorski, Oct. 1950, IMI 63012, holotypus; K, isotype. Conidiomata: pycnidial, scattered, single (rarely in twos or threes), deeply immersed in the tissue of ascocarps of Cenangium jerruginosum arising from twigs of pine (the external appearance of the ascocarps scarcely altered by the presence of the pycnidia), globose, 120-270 JLm diam, ostiolate, having a wall 12-18 JLm thick, 4-6 cells deep, of which the outer cells are pigmented and rather 20 flattened, approaching textura intricata, and the 1-lm inner more or less globose and hyaline, of textura angularis. Conidiophores: absent. Conidiogenous cells: monophialidic, smooth, hyaline, more or less ampulliform, 5-7 JLm diam. Conidia: !-septate, or very rarely 2-3-septate, thin-walled, smooth, brown, Fig. I. Pseudodiplodia cenangiicola: a) conidia, b) elliptical (sometimes almost cylindrical), 8-12 x conidiogenous cells and part of the pycnidium wall. 4-6 JLm, scarcely or not constricted at the septum. When immature, more or less hyaline and aseptate. In the original description, Nevodovsky placed this Pseudodiplodia cenangiicola Nevodovsky ex Minter, species in Microdiplodia, a generic name which, sp. nov. according to Sutton (1977) is somewhat confused and = Microdiplodia cenangiico/a Nevodovsky, in need of type studies. Subsequent studies by B.J. Griby SSSR, fasc. 2, no. 29 (1954), nom. inval. Dyko (unpublished) show that this name is not (Article 31); as 'cenangicola'. available for this fungus . Close examination of the conidium ontogeny of this species showed it to be Conidiomata: pycnidia sunt, sparsa, singulatim phialidic, and as such, it is best placed under the (rarius bina vel terna) in ascocarporum textura earlier name Pseudodiplodia (Karsten) Sacc. Cenangii ferruginosi alte submersa, qui ipsi ex Pini (Saccardo 1884), a genus with simple pycnidia virgis exoriuntur et minime praesens ob pycnidium producing !-septate pigmented spores from phialides, adspectu differunt. Globosa sunt, 120-270 JLm diam, antedating by almost twenty years the first use of et ostiolata, parietem quaeque habentia 12-18 JLm et Microdip/odia. 4-6 cellulis altitudine, quarum exteriores obscurae et paulum complanatae videntur, texturam Acknowledgement. The author wishes to thank Drs B.C. Sutton and D.L. Hawksworth for their advice on appropinquantes intricatam, sed interiores globosae nomenclature and taxonomy. et plus minusve hyalinae sunt, texturam habentes angularem. Conidiophori: absunt. Cellulae conidiogenae: monophialidicae sunt, et !eves, References hyalinae, plus minusve ampulliformes, 5-7 JLm diam. Conidia: uniseptata, rarissime 2-3 septata, Saccardo, P.A. 1884: Sylloge Fungorum 3. - 860 pp. tenuibus cum parietibus, Ievia, brunnea, elliptica Patavii. Sutton, B.C. 1977: Coelomycetes 6. Nomenclature of (interdum paene cylindrica), 8-12 x 4-6 JLm sunt, generic names proposed for Coelomycetes. vix vel non constricta; sed prius matura quam sunt, Mycological Papers 141: 1-253. Accepted for publication on August 14, 1979 .
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